spandsp  0.0.6
noise.h File Reference

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Typedefs

typedef struct noise_state_s noise_state_t
 

Enumerations

enum  { NOISE_CLASS_AWGN = 1, NOISE_CLASS_HOTH }
 

Functions

noise_state_tnoise_init_dbm0 (noise_state_t *s, int seed, float level, int class_of_noise, int quality)
 Initialise an audio noise generator. More...
 
noise_state_tnoise_init_dbov (noise_state_t *s, int seed, float level, int class_of_noise, int quality)
 
int noise_release (noise_state_t *s)
 
int noise_free (noise_state_t *s)
 
int16_t noise (noise_state_t *s)
 Generate a sample of audio noise. More...
 

Typedef Documentation

◆ noise_state_t

typedef struct noise_state_s noise_state_t

Noise generator descriptor. This contains all the state information for an instance of the noise generator.

Function Documentation

◆ noise()

int16_t noise ( noise_state_t s)

Generate a sample of audio noise.

Generate a sample of audio noise.

Parameters
sThe noise generator context.
Returns
The generated sample.

◆ noise_init_dbm0()

noise_state_t* noise_init_dbm0 ( noise_state_t s,
int  seed,
float  level,
int  class_of_noise,
int  quality 
)

Initialise an audio noise generator.

Initialise an audio noise generator.

Parameters
sThe noise generator context.
seedA seed for the underlying random number generator.
levelThe noise power level in dBmO.
class_of_noiseThe class of noise (e.g. AWGN).
qualityA parameter which permits speed and accuracy of the noise generation to be adjusted.
Returns
A pointer to the noise generator context.